values can be found in musickit.js source code: (e[(e.none = 0)] = "none"), (e[(e.loading = 1)] = "loading"), (e[(e.playing = 2)] = "playing"), (e[(e.paused = 3)] = "paused"), (e[(e.stopped = 4)] = "stopped"), (e[(e.ended = 5)] = "ended"), (e[(e.seeking = 6)] = "seeking"), (e[(e.waiting = 8)] = "waiting"), (e[(e.stalled = 9)] = "stalled"), (e[(e.completed = 10)] = "completed"),